PMID- 17316752
OWN - NLM
STAT- MEDLINE
DCOM- 20070730
LR  - 20131121
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 68
IP  - 2
DP  - 2007 Jun
TI  - Dissipation of 2,4-D in soils of the Humid Pampa region, Argentina: a microcosm 
      study.
PG  - 259-65
AB  - Phenoxy herbicides like 2,4-dichlorophenoxyacetic acid (2,4-D) are widely used in 
      agricultural practices. Although its half life in soil is 7-14d, the herbicide 
      itself and its first metabolite 2,4-dichlorophenol (2,4-DCP) could remain in the 
      soil for longer periods, as a consequence of its intensive use. Microcosms assays 
      were conducted to study the influence of indigenous microflora and plants 
      (alfalfa) on the dissipation of 2,4-D from soils of the Humid Pampa region, 
      Argentina, with previous history of phenoxy herbicides application. Results 
      showed that 2,4-D was rapidly degraded, and the permanence of 2,4-DCP in soil 
      depended on the presence of plants and soil microorganisms. Regarding soil 
      microbial community, the presence of 2,4-D degrading bacteria was detected even 
      in basal conditions in this soil, possibly due to the adaptation of the 
      microflora to the herbicide. There was an increment of two orders of magnitude in 
      herbicide degraders after 15d from 2,4-D addition, both in planted and unplanted 
      microcosms. Total heterotrophic bacteria numbers were about 1x10(8) CFUg(-1) dry 
      soil and no significant differences were found between different treatments. 
      Overall, the information provided by this work indicates that the soil under 
      study has an important intrinsic degradation capacity, given by a microbial 
      community adapted to the presence of phenoxy herbicides.
FAU - Merini, Luciano J
AU  - Merini LJ
AD  - Microbiologia Industrial y Biotecnologia, Facultad de Farmacia y Bioquimica, 
      Universidad de Buenos Aires Junin 956 (1113), Ciudad Autonoma de Buenos Aires, 
      Argentina.
FAU - Cuadrado, Virginia
AU  - Cuadrado V
FAU - Flocco, Cecilia G
AU  - Flocco CG
FAU - Giulietti, Ana M
AU  - Giulietti AM
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20070221
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Herbicides)
RN  - 0 (Humic Substances)
RN  - 0 (Soil Pollutants)
RN  - 2577AQ9262 (2,4-Dichlorophenoxyacetic Acid)
SB  - IM
MH  - 2,4-Dichlorophenoxyacetic Acid/*chemistry/metabolism/pharmacology
MH  - Argentina
MH  - Bacteria/metabolism
MH  - Biodegradation, Environmental
MH  - Ecosystem
MH  - Environmental Monitoring
MH  - Herbicides/*chemistry/metabolism/pharmacology
MH  - Humic Substances/*analysis
MH  - Medicago sativa/drug effects
MH  - Soil Microbiology
MH  - Soil Pollutants/*chemistry
EDAT- 2007/02/24 09:00
MHDA- 2007/07/31 09:00
CRDT- 2007/02/24 09:00
PHST- 2006/08/11 00:00 [received]
PHST- 2007/01/08 00:00 [revised]
PHST- 2007/01/08 00:00 [accepted]
PHST- 2007/02/24 09:00 [pubmed]
PHST- 2007/07/31 09:00 [medline]
PHST- 2007/02/24 09:00 [entrez]
AID - S0045-6535(07)00094-X [pii]
AID - 10.1016/j.chemosphere.2007.01.012 [doi]
PST - ppublish
SO  - Chemosphere. 2007 Jun;68(2):259-65. doi: 10.1016/j.chemosphere.2007.01.012. Epub 
      2007 Feb 21.